As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A SECTION OF EMERGENCY LIGHTING WAS NOTED TO BE INOPERATIVE DURING THE PREFLIGHT INSPECTION. MAINTENANCE INSPECTED AND REPLACED THE 5LK EMERGENCY BATTERY PACK, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-51-01. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.